217823340223 has 2 divisors, whose sum is σ = 217823340224. Its totient is φ = 217823340222.

The previous prime is 217823340181. The next prime is 217823340263. The reversal of 217823340223 is 322043328712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217823340223 - 2¹³ = 217823332031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217823340263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108911670111 + 108911670112.

It is an arithmetic number, because the mean of its divisors is an integer number (108911670112).

Almost surely, 2^217823340223 is an apocalyptic number.

217823340223 is a deficient number, since it is larger than the sum of its proper divisors (1).

217823340223 is an equidigital number, since it uses as much as digits as its factorization.

217823340223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 37.

Adding to 217823340223 its reverse (322043328712), we get a palindrome (539866668935).

The spelling of 217823340223 in words is "two hundred seventeen billion, eight hundred twenty-three million, three hundred forty thousand, two hundred twenty-three".